Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cca319c8a05b6c…

MALICIOUS

PDF

59.3 KB Created: 2020-08-07 05:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f289e865a1176393d24cf987a0cb024 SHA-1: 964f54f0241868c3e38a04b30f45f0de25245945 SHA-256: 99cca319c8a05b6c12d9d7162282851a1e7807bde07fb21f2ea1d313dbfe6275
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'https://ttraff.com/pify?keyword=arsene+lupin+sherlock+holmes+pdf'. This indicates the document's primary purpose is to lure users to malicious infrastructure. No scripts were extracted from this sample, limiting further analysis of its behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=arsene+lupin+sherlock+holmes+pdf In PDF document text
    • http://files.qiman.org/uploads/1/3/2/7/132740665/petibigajokuk.pdfIn PDF document text
    • http://gitos.haitiinternationalalliance.org/uploads/1/3/1/1/131164239/siboveludi_zomabepado_kemugojadopid.pdfIn PDF document text
    • http://files.twistedtangerine.com/uploads/1/3/1/4/131438567/lewizimopef_jobizibejuk_dojutevaba.pdfIn PDF document text
    • http://files.dkg-etachi.org/uploads/1/3/1/0/131071019/kosuk.pdfIn PDF document text
    • http://files.richardmarshall-hardy.com/uploads/1/3/0/8/130874012/32143ebc8df59d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/19484321150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/65744949221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/xaxopubasulewoxeruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/17342641612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/tojitilixesofonumadifagom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/printable_november_2020_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/67451754832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/fozukuzakuzofejubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/zivajepog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/jagabipikakod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/anemia_aplsica_idioptica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/zuwovoxur.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF2 5040 bytes
SHA-256: 0076b90b910a9a3146e88eb7e475eb22e97dc8f3c266a8458f917bae920e619e
font_01_sfnt_off0000aed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED7 10240 bytes
SHA-256: cd7b5a09fe86970d25a993bb63cd8cd5ac932f9248f2eb58a471127c0c82713b
font_02_sfnt_off0000d1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2